Abstract
This paper describes a structural optimization method for SEA subsystems which realization of the desired value of loss factors is necessary. The authors developed a structural design process on the basis of experimental SEA for reducing structure-borne sound in real-world machinery. The process identifies the loss factors which need to be changed in order to effectively reduce the structure-borne noise emitted from machinery. The authors studied the FEM-SEA method, where the evaluation of the coupling loss factors was performed with respect to the target subsystem instead of the entire system. The structural optimization method is based on a combination of FEM-SEA method and an optimization procedure. In this paper, the proposed method for the structural optimization is applied to an actual machine. The optimization method is shown to work well at the target frequency band under arbitrary constraints.
